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Nature of Operations and Summary of Significant Accounting Policies - Impact of ASC 326 (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Jan. 01, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for Loan Losses | $ 57,027 | $ 22,577 | $ 17,667
Commercial |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for Loan Losses |  | 13,618 |
Real estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for Loan Losses |  | 4,048 |
Mortgage warehouse |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for Loan Losses | $ 1,267 | 0 | 1,077
Consumer |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for Loan Losses |  | 4,911 |
As Reported Under ASC 326 |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for Loan Losses |  | 40,244 |
As Reported Under ASC 326 | Commercial |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for Loan Losses |  | 25,614 |
As Reported Under ASC 326 | Real estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for Loan Losses |  | 4,971 |
As Reported Under ASC 326 | Mortgage warehouse |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for Loan Losses |  | 1,077 |
As Reported Under ASC 326 | Consumer |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for Loan Losses |  | 8,582 |
Pre–ASC 326 Adoption |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for Loan Losses |  | 17,667 | 22,577
Pre–ASC 326 Adoption | Commercial |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for Loan Losses |  | 11,996 |
Pre–ASC 326 Adoption | Real estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for Loan Losses |  | 923 |
Pre–ASC 326 Adoption | Mortgage warehouse |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for Loan Losses |  | 1,077 | $ 0
Pre–ASC 326 Adoption | Consumer |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for Loan Losses |  | $ 3,671 |

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